return-path
This might be first in a weekly series on the topic of Deliverability Terminology. Let me know in email or in the comments if you find this useful — that’ll help guide my future efforts.In today’s Deliverability Terminology blog post, allow me to explain the Return-path address.This is also called the envelope sender address/domain, bounce address or domain, or the 5321 FROM or MFROM.What is it: Not to oversimplify it too much (hopefully), but email message have two from addresses. There’s what you normally think of as the from address – this is specified in the “from:” header in your email message and it shows up in your email client, webmail client or mobile email application. There’s also a second from address, called the return-path or envelope sender address. After selecting “view all headers” or raw email source, search for “return-path” to find this header and its contents.Mail servers transmit this…